cline: src/regex_parser.c@0d2c13c24fd0

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2017 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  * 1. Redistributions of source code must retain the above copyright

     9  * notice, this list of conditions and the following disclaimer.

    10  *

    11  * 2. Redistributions in binary form must reproduce the above copyright

    12  * notice, this list of conditions and the following disclaimer in the

    13  * documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    18  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

    19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

    20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

    22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

    23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    25  *

    26  * regex_parser.c

    27  *

    28  *  Created on: 26.01.2012

    29  *      Author: Mike

    30  */

    32 #include "regex_parser.h"

    34 regex_parser_t* new_regex_parser_t() {

    35   regex_parser_t* ret = malloc(sizeof(regex_parser_t));

    36   if (ret != NULL) {

    37     ret->pattern_list = new_string_list_t();

    38     ret->matched_lines = 0;

    39     ret->pattern_match = 0;

    40     ret->compiled_patterns = NULL;

    41     ret->compiled_pattern_count = 0;

    42   }

    43   return ret;

    44 }

    46 void regex_destcomppats(regex_parser_t* parser) {

    47   if (parser->compiled_patterns != NULL) {

    48     for (int i = 0 ; i < parser->compiled_pattern_count ; i++) {

    49       if (parser->compiled_patterns[i] != NULL) {

    50         free(parser->compiled_patterns[i]);

    51       }

    52     }

    53     free(parser->compiled_patterns);

    54     parser->compiled_patterns = NULL;

    55     parser->compiled_pattern_count = 0;

    56   }

    57 }

    59 void destroy_regex_parser_t(regex_parser_t* parser) {

    60   regex_destcomppats(parser);

    61   destroy_string_list_t(parser->pattern_list);

    62   free(parser);

    63 }

    65 bool regex_parser_matching(regex_parser_t* parser) {

    66   return parser->pattern_match > 0;

    67 }

    69 int regex_parser_do(regex_parser_t* parser, char* input) {

    70   int err = REG_NOMATCH;

    71   if (parser->compiled_pattern_count > 0) {

    72     regmatch_t match;

    74     if (regex_parser_matching(parser)) {

    75       parser->matched_lines++;

    77       err = regexec(parser->compiled_patterns[parser->pattern_match],

    78           input, 1, &match, 0);

    79       if (err > 0 && err != REG_NOMATCH) {

    80         fprintf(stderr, "Regex-Error: 0x%08x", err);

    81       }

    82       if (err == 0) {

    83         parser->pattern_match = 0;

    84         /* do not match line, if it does not end with the pattern */

    85         if (match.rm_eo < strlen(input)) {

    86           parser->matched_lines--;

    87         }

    88       }

    89     } else {

    90       for (int i = 0 ; i < parser->compiled_pattern_count - 1 ; i += 2) {

    91         err = regexec(parser->compiled_patterns[i], input, 1, &match, 0);

    92         if (err > 0 && err != REG_NOMATCH) {

    93           fprintf(stderr, "Regex-Error: 0x%08x", err);

    94         }

    95         if (err == 0) {

    96           parser->pattern_match = i+1;

    97           parser->matched_lines = 0;

    98           /* Check, if end pattern is also in this line */

    99           regex_parser_do(parser, input);

   100           /* do not match line, if it does not start with the pattern */

   101           if (match.rm_so > 0 && parser->matched_lines > 0) {

   102             parser->matched_lines--;

   103           }

   104           break;

   105         }

   106       }

   107     }

   108   }

   109   return err;

   110 }

   112 bool regex_compile_all(regex_parser_t* parser) {

   113   bool success = true;

   114   size_t pcount = parser->pattern_list->count;

   115   if (pcount > 0) {

   116     regex_destcomppats(parser);

   117     parser->compiled_patterns = calloc(pcount, sizeof(regex_t));

   118     parser->compiled_pattern_count = pcount;

   120     regex_t* re;

   121     for (int i = 0 ; i < pcount ; i++) {

   122       re = malloc(sizeof(regex_t));

   123       if (regcomp(re, parser->pattern_list->items[i], REG_EXTENDED) == 0) {

   124         parser->compiled_patterns[i] = re;

   125       } else {

   126         fprintf(stderr, "Cannot compile pattern: %s\n",

   127             (parser->pattern_list->items[i]));

   128         parser->compiled_patterns[i] = NULL;

   129         success = false;

   130       }

   131     }

   132   }

   133   return success;

   134 }

Mercurial > hg > cline / file revision